?? libmng_chunk_io.c
字號:
pBuf->iTRNSgreen = mng_get_uint16 (pRawdata+2);
pBuf->iTRNSblue = mng_get_uint16 (pRawdata+4);
pBuf->iTRNScount = 0;
break;
}
case 3: { /* indexed */
pBuf->iTRNSgray = 0;
pBuf->iTRNSred = 0;
pBuf->iTRNSgreen = 0;
pBuf->iTRNSblue = 0;
pBuf->iTRNScount = iRawlen;
MNG_COPY (pBuf->aTRNSentries, pRawdata, iRawlen)
break;
}
}
pBuf->bHasTRNS = MNG_TRUE; /* tell it it's got a tRNS now */
}
else
#endif
{ /* address current object */
pImage = (mng_imagep)pData->pCurrentobj;
if (!pImage) /* no object then dump it in obj 0 */
pImage = (mng_imagep)pData->pObjzero;
pBuf = pImage->pImgbuf; /* address object buffer */
pBuf->bHasTRNS = MNG_TRUE; /* and tell it it's got a tRNS now */
if (iRawlen == 0) /* if empty, inherit from global */
{
iRawlen2 = pData->iGlobalTRNSrawlen;
pRawdata2 = (mng_ptr)(pData->aGlobalTRNSrawdata);
/* global length oke ? */
if ((pData->iColortype == 0) && (iRawlen2 != 2))
MNG_ERROR (pData, MNG_GLOBALLENGTHERR)
if ((pData->iColortype == 2) && (iRawlen2 != 6))
MNG_ERROR (pData, MNG_GLOBALLENGTHERR)
if ((pData->iColortype == 3) && ((iRawlen2 == 0) || (iRawlen2 > pBuf->iPLTEcount)))
MNG_ERROR (pData, MNG_GLOBALLENGTHERR)
}
else
{
iRawlen2 = iRawlen;
pRawdata2 = pRawdata;
}
switch (pData->iColortype) /* store fields for future reference */
{
case 0: { /* gray */
pBuf->iTRNSgray = mng_get_uint16 (pRawdata2);
pBuf->iTRNSred = 0;
pBuf->iTRNSgreen = 0;
pBuf->iTRNSblue = 0;
pBuf->iTRNScount = 0;
break;
}
case 2: { /* rgb */
pBuf->iTRNSgray = 0;
pBuf->iTRNSred = mng_get_uint16 (pRawdata2);
pBuf->iTRNSgreen = mng_get_uint16 (pRawdata2+2);
pBuf->iTRNSblue = mng_get_uint16 (pRawdata2+4);
pBuf->iTRNScount = 0;
break;
}
case 3: { /* indexed */
pBuf->iTRNSgray = 0;
pBuf->iTRNSred = 0;
pBuf->iTRNSgreen = 0;
pBuf->iTRNSblue = 0;
pBuf->iTRNScount = iRawlen2;
MNG_COPY (pBuf->aTRNSentries, pRawdata2, iRawlen2)
break;
}
}
}
}
else /* store as global */
{
pData->iGlobalTRNSrawlen = iRawlen;
MNG_COPY (pData->aGlobalTRNSrawdata, pRawdata, iRawlen)
{ /* create an animation object */
mng_retcode iRetcode = mng_create_ani_trns (pData, pData->iGlobalTRNSrawlen,
pData->aGlobalTRNSrawdata);
if (iRetcode) /* on error bail out */
return iRetcode;
}
}
#endif /* MNG_SUPPORT_DISPLAY */
#ifdef MNG_STORE_CHUNKS
if (pData->bStorechunks)
{ /* initialize storage */
mng_retcode iRetcode = ((mng_chunk_headerp)pHeader)->fCreate (pData, pHeader, ppChunk);
if (iRetcode) /* on error bail out */
return iRetcode;
if ((pData->bHasIHDR) || (pData->bHasBASI) || (pData->bHasDHDR))
{ /* not global! */
((mng_trnsp)*ppChunk)->bGlobal = MNG_FALSE;
((mng_trnsp)*ppChunk)->iType = pData->iColortype;
if (iRawlen == 0) /* if empty, indicate so */
((mng_trnsp)*ppChunk)->bEmpty = MNG_TRUE;
else
{
((mng_trnsp)*ppChunk)->bEmpty = MNG_FALSE;
switch (pData->iColortype) /* store fields */
{
case 0: { /* gray */
((mng_trnsp)*ppChunk)->iGray = mng_get_uint16 (pRawdata);
break;
}
case 2: { /* rgb */
((mng_trnsp)*ppChunk)->iRed = mng_get_uint16 (pRawdata);
((mng_trnsp)*ppChunk)->iGreen = mng_get_uint16 (pRawdata+2);
((mng_trnsp)*ppChunk)->iBlue = mng_get_uint16 (pRawdata+4);
break;
}
case 3: { /* indexed */
((mng_trnsp)*ppChunk)->iCount = iRawlen;
MNG_COPY (((mng_trnsp)*ppChunk)->aEntries, pRawdata, iRawlen)
break;
}
}
}
}
else /* it's global! */
{
((mng_trnsp)*ppChunk)->bEmpty = (mng_bool)(iRawlen == 0);
((mng_trnsp)*ppChunk)->bGlobal = MNG_TRUE;
((mng_trnsp)*ppChunk)->iType = 0;
((mng_trnsp)*ppChunk)->iRawlen = iRawlen;
MNG_COPY (((mng_trnsp)*ppChunk)->aRawdata, pRawdata, iRawlen)
}
}
#endif /* MNG_STORE_CHUNKS */
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_READ_TRNS, MNG_LC_END)
#endif
return MNG_NOERROR; /* done */
}
/* ************************************************************************** */
READ_CHUNK (mng_read_gama)
{
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_READ_GAMA, MNG_LC_START)
#endif
/* sequence checks */
#ifdef MNG_INCLUDE_JNG
if ((!pData->bHasMHDR) && (!pData->bHasIHDR) &&
(!pData->bHasBASI) && (!pData->bHasDHDR) && (!pData->bHasJHDR))
#else
if ((!pData->bHasMHDR) && (!pData->bHasIHDR) &&
(!pData->bHasBASI) && (!pData->bHasDHDR) )
#endif
MNG_ERROR (pData, MNG_SEQUENCEERROR)
#ifdef MNG_INCLUDE_JNG
if ((pData->bHasIDAT) || (pData->bHasPLTE) || (pData->bHasJDAT) || (pData->bHasJDAA))
#else
if ((pData->bHasIDAT) || (pData->bHasPLTE))
#endif
MNG_ERROR (pData, MNG_SEQUENCEERROR)
#ifdef MNG_INCLUDE_JNG
if ((pData->bHasIHDR) || (pData->bHasBASI) || (pData->bHasDHDR) || (pData->bHasJHDR))
#else
if ((pData->bHasIHDR) || (pData->bHasBASI) || (pData->bHasDHDR))
#endif
{ /* length must be exactly 4 */
if (iRawlen != 4)
MNG_ERROR (pData, MNG_INVALIDLENGTH)
}
else
{ /* length must be empty or exactly 4 */
if ((iRawlen != 0) && (iRawlen != 4))
MNG_ERROR (pData, MNG_INVALIDLENGTH)
}
#ifdef MNG_INCLUDE_JNG
if ((pData->bHasIHDR) || (pData->bHasBASI) || (pData->bHasDHDR) || (pData->bHasJHDR))
#else
if ((pData->bHasIHDR) || (pData->bHasBASI) || (pData->bHasDHDR))
#endif
pData->bHasGAMA = MNG_TRUE; /* indicate we've got it */
else
pData->bHasglobalGAMA = (mng_bool)(iRawlen != 0);
#ifdef MNG_SUPPORT_DISPLAY
#ifdef MNG_INCLUDE_JNG
if ((pData->bHasIHDR) || (pData->bHasBASI) || (pData->bHasDHDR) || (pData->bHasJHDR))
#else
if ((pData->bHasIHDR) || (pData->bHasBASI) || (pData->bHasDHDR))
#endif
{
mng_imagep pImage;
#ifndef MNG_NO_DELTA_PNG
if (pData->bHasDHDR) /* update delta image ? */
{ /* store in object 0 ! */
pImage = (mng_imagep)pData->pObjzero;
/* store for color-processing routines */
pImage->pImgbuf->iGamma = mng_get_uint32 (pRawdata);
pImage->pImgbuf->bHasGAMA = MNG_TRUE;
}
else
#endif
{
pImage = (mng_imagep)pData->pCurrentobj;
if (!pImage) /* no object then dump it in obj 0 */
pImage = (mng_imagep)pData->pObjzero;
/* store for color-processing routines */
pImage->pImgbuf->iGamma = mng_get_uint32 (pRawdata);
pImage->pImgbuf->bHasGAMA = MNG_TRUE;
}
}
else
{ /* store as global */
if (iRawlen != 0)
pData->iGlobalGamma = mng_get_uint32 (pRawdata);
{ /* create an animation object */
mng_retcode iRetcode = mng_create_ani_gama (pData, (mng_bool)(iRawlen == 0),
pData->iGlobalGamma);
if (iRetcode) /* on error bail out */
return iRetcode;
}
}
#endif /* MNG_SUPPORT_DISPLAY */
#ifdef MNG_STORE_CHUNKS
if (pData->bStorechunks)
{ /* initialize storage */
mng_retcode iRetcode = ((mng_chunk_headerp)pHeader)->fCreate (pData, pHeader, ppChunk);
if (iRetcode) /* on error bail out */
return iRetcode;
/* store the fields */
((mng_gamap)*ppChunk)->bEmpty = (mng_bool)(iRawlen == 0);
if (iRawlen)
((mng_gamap)*ppChunk)->iGamma = mng_get_uint32 (pRawdata);
}
#endif /* MNG_STORE_CHUNKS */
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_READ_GAMA, MNG_LC_END)
#endif
return MNG_NOERROR; /* done */
}
/* ************************************************************************** */
#ifndef MNG_SKIPCHUNK_cHRM
READ_CHUNK (mng_read_chrm)
{
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_READ_CHRM, MNG_LC_START)
#endif
/* sequence checks */
#ifdef MNG_INCLUDE_JNG
if ((!pData->bHasMHDR) && (!pData->bHasIHDR) &&
(!pData->bHasBASI) && (!pData->bHasDHDR) && (!pData->bHasJHDR))
#else
if ((!pData->bHasMHDR) && (!pData->bHasIHDR) &&
(!pData->bHasBASI) && (!pData->bHasDHDR) )
#endif
MNG_ERROR (pData, MNG_SEQUENCEERROR)
#ifdef MNG_INCLUDE_JNG
if ((pData->bHasIDAT) || (pData->bHasPLTE) || (pData->bHasJDAT) || (pData->bHasJDAA))
#else
if ((pData->bHasIDAT) || (pData->bHasPLTE))
#endif
MNG_ERROR (pData, MNG_SEQUENCEERROR)
#ifdef MNG_INCLUDE_JNG
if ((pData->bHasIHDR) || (pData->bHasBASI) || (pData->bHasDHDR) || (pData->bHasJHDR))
#else
if ((pData->bHasIHDR) || (pData->bHasBASI) || (pData->bHasDHDR))
#endif
{ /* length must be exactly 32 */
if (iRawlen != 32)
MNG_ERROR (pData, MNG_INVALIDLENGTH)
}
else
{ /* length must be empty or exactly 32 */
if ((iRawlen != 0) && (iRawlen != 32))
MNG_ERROR (pData, MNG_INVALIDLENGTH)
}
#ifdef MNG_INCLUDE_JNG
if ((pData->bHasIHDR) || (pData->b?? 快捷鍵說明
復(fù)制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -